Tenuipteria fibrosa
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Geological context: Late Cretaceous, Pierre Sh, Elk Butte Mbr. Collection locality: siderite concs., in place from conc. layers 5-20 ft above river and float from those layers in river bed below, NE-facing cliff on W bank of Moreau River, 1.5 mi due W of SD Rt. 65 bridge, & 6.7 mi E of Thunder Butte village, Ziebach County, South Dakota, USA. Collected by Karl M. Waage, Russell D. White, Helen Ross, 1985. IP number 599206; lot count 1; original nature=part/counterpart; taphonomy=concretion; accn=IPA.07048; associatedwith=on same slab: IP.599207,on same slab: IP.599208,on same slab: IP.599209,on same slab: IP.599210,original label stored with this specimen: IP.599204.
Yale Peabody Museum’s own description
